Why is hbase.hstore.compaction.ratio missing from sandbox?

[#1]

I am testing minor compaction performance and noticed the configration hbase.hstore.compaction.ratio is not available on the sandbox within hbase-site.xml. How come?

[#2 · Accepted solution]

I checked two in-house clusters.

hbase.hstore.compaction.ratio wasn't in hbase-site.xml there either. We use default value.

Did you observe any undesired effect ?

[#3]

@Ted Yu My mind drew a black about defaults. HBase will use default value unless you specifcy in ambari custom hbase site. thanks

[#4]

You can always set it directly in hbase-site.xml, then sync across cluster. Manual work though.

[#5]

The default value of 1.2 is good for majority of cases. You can play with enabling off peak compaction (when this ratio is set to 5 by default, as far as I remember) as well - hbase.hstore.compaction.ratio.offpeak.